Monessen Hearth DLX18 User manual

MODELS
DLX18
DLX24
DLX28
Natural Gas or Propane/LPG
Control Type:
Manual, Thermostat or Milli-Volt
UNVENTED GAS LOG HEATER OR
VENTED DECORATIVE APPLIANCE
INSTALLATION AND OPERATING INSTRUCTIONS
READ AND SAVE THESE INSTRUCTIONS
WARNINGS
If the information in this manual is not followed exactly,
a fire or explosion may result causing property damage,
personal injury or loss of life.
– Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any other
appliance.
– WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any
phone in your building.
• Immediately call your gas supplier from a neighbor's
phone. Follow the gas supplier's instructions.
• If you cannot reach your gas supplier, call the fire
department.
– Installation and service must be performed by
a qualified installer, service agency or the gas
supplier.
This is an unvented gas-fired heater.
It uses air (oxygen) from the room
in which it is installed. Provisions
for adequate combustion and
ventilation air must be provided. See
page 7.
This appliance may be installed in
an aftermarket, permanently located,
manufactured (mobile) home, where
not prohibited by local codes.
This appliance is only for use with the
type of gas indicated on the rating plate.
This appliance is not convertible for use
with other gases.

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CONTENTS
Important Safety Information .......................... 3
Getting Started ................................................. 5
Product Features and Specifications ............. 6
General Installation Information .................... 7
Fireplace and Hearth Dimensions ................. 9
Placement in a Fireplace with a
Restrictive Barrier .................................... 10
Clearances and Height Requirements ......... 11
Floor Clearance ............................................. 16
Fireplace Preparation .................................... 17
Installing Vented Applications ..................... 18
Connecting the Gas........................................ 19
Checking Gas Pressure ................................ 20
Electrical Wiring (Milli-volt) ........................... 21
Log Placement ............................................... 23
Flame Appearance ......................................... 24
Checking the Burner Flame .......................... 25
Operating Instructions .................................. 26
For Your Safety Read Before Lighting ........ 26
Manual Control Lighting Instructions .......... 27
Thermostat Control Lighting Instructions ... 28
MilliVolt Lighting Instructions ....................... 29
Match Lighting Instructions ........................ 30
Cleaning and Servicing ................................. 31
Replacement Parts List ................................. 32
Troubleshooting ............................................ 34

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10. This unit complies with ANSI Z21.11.2b Unvented Heat-
ers and also complies with ANSI Z21.60 Decorative Vent-
ed Appliances for Solid Fuel Burning Fireplaces. State and
local codes may only allow operation of this appliance in
a vented conguration. Check your state or local codes.
For vented operation, see “VENTED INSTRUCTIONS”
in this manual.
11. Do not install the heaters in a bathroom or bedroom.
12. Correct installation of the ceramic ber logs, proper lo-
cation of the heater, and annual cleaning are necessary to
avoid potential problems with sooting. Sooting, resulting
from improper installation or operation, can settle on sur-
faces outside the replace. See log placement instructions
for proper installation.
13. Avoid any drafts that alter burner ame patterns. Do not
allow fans to blow directly into replace. Do not place
a blower inside burn area of rebox. Ceiling fans may
create drafts that alter burner ame patterns. Sooting and
improper burning will occur.
14. Caution: Candles, incense, oil lamps, etc. produce com-
bustion byproducts including soot. Vent-free appliances
will not lter or clean soot produced by these types of
products. In addition, the smoke and/or aromatics (scents)
may be reburnt in the vent-free appliance which can pro-
duce odors. It is recommended to minimize the use of
candles, incense, etc. while the vent-free appliance is in
operation.
15. This is an unvented gas-red heater. It uses air (oxygen)
from the room in which it is installed. Provisions for ade-
quate combustion and ventilation air must be provided.
See installation guidelines.
INSTALLER
Please leave these instructions with the appliance.
OWNER
Please retain these instructions for future reference .
IMPORTANT
Read these instructions carefully before installing or trying to operate this vent-free gas heater.
IMPORTANT SAFETY INFORMATION
1. Due to high temperatures, the heater should be
located out of trafc and away from furniture and
draperies.
2. Children and adults should be alerted to the hazard
of high surface temperature and should stay away to
avoid burns or clothing ignition.
3. Young children should be carefully supervised when
they are in the same room with the heater
4. Do not place clothing or other ammable material
near the replace when the heater is in use.
5. Any safety screen or guard removed for servicing,
must be replaced prior to operating the heater.
6. Installation and repair should be done by a qualied
service person.
7. To prevent malfunction and/or sooting, an unvented
gas heater should be cleaned at least annually by a
professional service person. More frequent cleaning
may be required due to excessive lint from carpeting,
etc. It is imperative that control compartments, burn-
ers and circulating air passageways be kept clean.
8. CARBON MONOXIDE POISONING: Early signs of
carbon monoxide poisoning are similar to the u with
headaches, dizziness and/or nausea. If you have these
signs, obtain fresh air immediately. Have the heater ser-
viced as it may not be operating properly.
9. The installation must conform with local codes or,
in the absence of local codes, with the National Fuel Gas
Code, ANSI Z223.l/NFPA54. Continued on page 4
• Any change to this heater or its controls can be dangerous.
• Improper installation or use of the heater can cause serious injury or death from fire,
burns, explosion or carbon monoxide poisoning.
• Do not allow fans to blow directly into the fireplace. Avoid drafts that alter burner flame
patterns.
• Do not use a blower insert, heat exchanger insert or other accessory, not approved
for use with this heater where applicable.
WARNING

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IMPORTANT SAFETY INFORMATION
Continued from page 3
16. Keep room area clear and free from combustible materials,
gasoline and other ammable vapors and liquids.
17. Unvented gas heaters are a supplemental zone heater. They
are not intended to be a primary heating appliance.
18. During manufacturing, fabricating and shipping, various
components of this appliance are treated with certain oils,
lms or bonding agents. These chemicals are not harmful
but may produce annoying smoke and smells as they are
burned off during the initial operation of the appliance;
possibly causing headaches or eye or lung irritation. This
is a normal and temporary occurrence.
The initial break-in operation should last two to three
hours with the burner at the highest setting. Provide
maximum ventilation by opening windows or doors to
allow odors to dissipate. Any odors remaining after this
initial break-in period will be slight and will disappear
with continued use.
19. Input ratings are shown in BTU per hour and are for ele-
vations up to 2,000 feet. For elevations above 2,000 feet,
input ratings should be reduced 4 percent for each 1,000
feet above sea level. See the National Fuel Gas Code.
20. The appliance and its appliance main gas valve must be
disconnected from the gas supply piping system during
any pressure testing of that system at test pressures in
excess of 1/2 psig (3.5 kPa).
21. The appliance must be isolated from the gas supply piping
system by closing its equipment shutoff valve during any
pressure testing of the gas supply piping system at test
pressures equal to or less than 1/2 psig (3.5 kPa).
22. Do not use this room heater if any part has been under
water. Immediately call a qualied service technician to
inspect the room heater and to replace any part of the
control system and any gas control which has been under
water.
23. This appliance must not be used with glass doors in the
closed position. This can lead to pilot outages and severe
sooting outside the replace.
24. Never burn solid fuels in a replace where a unvented
room heater is installed.
25. Always have a replace screen in place when the appliance
is in operation and , unless other provisions for combustion
air are provided, the screen shall have an opening(s) for
induction of combustion air.
26.FOR MASSACHUSETTS RESIDENTS ONLY:
This product must be installed by a
licensed plumber of gas fitter when
installed within the Commonwealth of
Massachusetts.
WARNING
27. Installation of this vented gas log in the Commonwealth
of Massachusetts requires the damper be permanently
removed or welded in the full open position. In addition, a
naturally vented gas log may not be installed in a bedroom
or bathroom in the Commonwealth of Massachusetts.
Flex line installation must not exceed 36".
Failure to keep the primary air openings
of the burners clean may result in
sooting and property damage.
WARNING

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MAKE SURE YOU HAVE RECEIVED ALL PARTS:
Check your packing list to verify that all listed parts have been received. You should have the following:
• Unvented gas log grate/burner assembly.
• Installation/operating instructions.
• Ceramic ber logs.
• Two (2) anchoring screws.
• Plastic bag containing crushed volcanic rock.
The millivolt controlled version of this heater is the only style designed to be operated with optional devices for ON/OFF
functions. The following options may be used with the millivolt controlled heater. These options are not packaged with the
log set.
• Hand held Remote w/receiver.
• Wall Switch with 15' wire.
• Wall T-stat with 15' wire.
• Hand held Thermostat Remote w/receiver.
Carefully inspect the contents for shipping damage. If any parts are missing or damaged, immediately inform the dealer
from whom you purchased the appliance. Do not attempt to install any part of the appliance unless you have
all parts in good condition.
What you will need for installation:
You must have the following items available before proceeding with installation:
• External regulator (for propane/L.P.G. and 1/2 lb. natural gas systems only)
• Piping which complies with local codes
• Pipe sealant approved for use with propane/L.P.G. (Resistant to sulfur compounds)
• Manual shutoff valve
• Sediment trap (recommended)
• Tee joint
• Pipe wrench or appropriate size crescent wrench set
• Screwdriver
• Drill, with 5/32 bit
GETTING STARTED
Handle the gas log burner assembly by the grate only. Do not pick the unit up by the
burners.
Gloves are recommended when handling ceramic fiber logs to prevent skin irritation
from loose fibers. Logs are fragile — handle with care.
CAUTION

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PROPANE / LPG
Note: An external regulator is required to reduce supply pressure to a maximum of 13" W.C.
MANUAL / T-STAT PRESSURE MILLIVOLT PRESSURE
Regulator Pressure Setting: 10" w.c. Regulator Pressure Setting: 10" w.c.
Gas Inlet Pressure: Maximum 13" w.c. Gas Inlet Pressure: Maximum 13" w.c.
Minimum 11" w.c. Minimum 11" w.c.
NATURAL GAS
Note: An external regulator is required to reduce supply pressure to a maximum of 101/2 W.C. (11" W.C.
for HI/LO) on natural gas systems operating at higher pressure.
MANUAL / T-STAT PRESSURE MILLIVOLT PRESSURE
Regulator Pressure Setting: 3" w.c. Regulator Pressure Setting: 3.5" w.c.
Pilot Regulator: 3.5" w.c.
Gas Inlet Pressure: Maximum 10 1/2" w. c. Gas Inlet Pressure: Max. 10 1/2" w. c.
Minimum 5" w.c. Min. 5" w.c.
IGNITION CONTROLS
Piezo ignitor allows ignition of the pilot without the use of matches or batteries.
Manual control has four (4) positions:
OFF - All gas to the gas logs is shut off at the valve.
IGN - Valve position to light/maintain a standing pilot.
LOW - Minimum gas rate — front burner provides a realistic glow on the center log.
HI - Maximum gas rate — front burner provides a realistic glow on the center log, plus the rear burner pro-
vides a pleasing yellow ame.
Gas Rate
Model Number Control Max BTU/Hr Min BTU/Hr
DLX18PM Manual 22,000 14,000
DLX24/28PM Manual 33,000 19,000
DLX18PT T-Stat 26,000 16,000
DLX24/28PT T-Stat 28,000 20,000
DLX18PV Milli-Volt 22,000 17,000
DLX24/28PV Milli-Volt 33,000 22,000
PRODUCT FEATURES AND SPECIFICATIONS
Gas Rate
Model Number Control Max BTU/Hr Min BTU/Hr
DLX18NM Manual 26,000 16,000
DLX24/28NM Manual 32,000 19,000
DLX18NT T-Stat 26,000 16,000
DLX24/28NT T-Stat 26,000 20,000
DLX18NV Milli-Volt 26,000 17,000
DLX24/28NV Milli-Volt 32,000 22,000

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Thermostat control has three (3) positions:
OFF - All gas to the gas logs is shut off at the valve.
IGN - Valve position to light/maintain a standing pilot.
LOW/HI - Variable position corresponding to desired temperature. Both front and rear burners are in operation to
provide realistic glow and yellow ame.
Milli-Volt control has four (4) positions:
OFF - All gas to the gas logs is shut off at the valve.
IGN - Valve position to light/maintain a standing pilot.
ON - Valve position to turn ON/OFF log set with remote switch/thermostat or with ON/OFF switch on
the set.
LOW/HI - Variable position to control ame height (heat output). Both front and rear burners are in operation to
provide realistic glow and yellow ame.
GENERAL INSTALLATION INFORMATION
CODES
Adhere to all local codes or, in their absence, the latest edition of THE NATIONAL FUEL GAS CODE ANSI Z223.1 or
NFPA54 which can be obtained from…
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
or
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
ADEQUATE COMBUSTION AND VENTILATION AIR
This heater shall not be installed in a conned space or unusually tight construction unless provisions are provided for ade-
quate combustion and ventilation air.
The National Fuel Gas Code, (ANSI Z223.1/NFPA54), denes a conned space as a space whose volume is less than 50
cubic feet per 1,000 BTU per hour (4.8 m3 per kw) of the aggregate input rating of all appliances installed in that space. An
unconned space is dened as a space whose volume is not less than 50 cubic feet per 1,000 BTU per hour (4.8 m3 per kw)
of the aggregate input rating of all appliances installed in that space. Rooms communicating directly with the space in which
the appliances are installed, through openings not furnished with doors, are considered a part of the unconned space.
UNUSUALLY TIGHT CONSTRUCTION IS DEFINED AS CONSTRUCTION WHERE…
a) walls and ceilings exposed to the outside atmosphere have a continuous water vapor retarder with a rating of 1 perm
(6 x 1011 kg per pa-sec-m2) or less with openings gasketed or sealed, and
b) weather striping has been added on openable windows and doors, and
c) caulking or sealant are applied to areas such as joints around windows and door frames; between sole plates and
oors; between wall-ceiling joints; between wall panels; at penetrations for plumbing, electrical, and gas lines; and at
other openings.

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

The following formula can be used to determine the maximum heater rating per the denition of unconned space:
BTU/HR = (L1 + L2) Ft x (W) Ft x (H) Ft
50
Consider two connecting rooms with an open area between, with the following dimensions:
L1 = 151/2 Ft., L2 = 12 Ft., W = 12 Ft., H = 8 Ft.
BTU/HR = (151/2 + 12) x (12) x (8) x 1000
50
If there were a door between the two rooms the calculation would be based only on the room with the heater.
BTU/HR = (151/2) x (12) x (8) x 1000
50
GENERAL INSTALLATION INFORMATION
Figure 1 - Example of a Large Room with 1/2 Wall Divider
Counter
Fireplace
x 1000
x 1000 = 52800 BTU/HR
x 1000 = 29760 BTU/HR
If the area in which the heater may be operated is smaller than that defined as an
unconfined space or if the building is of unusually tight construction, provide adequate
combustion and ventilation air by one of the methods described in the National Fuel
Gas Code, ANSI Z223.1/NFPA54, Section 5.3 or applicable local codes.
WARNING

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



Model A B C D
DLX18 171/2" 131/4" 27" 17"
DLX24 171/2" 14" 29" 17"
DLX28 241/2" 14" 33" 17"
FIREPLACE AND HEARTH DIMENSIONS
Use manufacturer's installation and clearance requirements as dened in their manual.
The LX Series unvented room heater may also be installed into a Ventless Firebox Enclosure for Gas Fired Decorative Type
Unvented Room Heaters per ANSI Z21.91(typically referred to as a "Universal Firebox"), as long as rebox hearth dimen-
sions meet the minimum hearth dimensions shown below.
Figure 2 - Minimum Hearth Dimensions
This appliance is for installation only in a solid-fuel burning masonry or UL127 factory-
built fireplace or in a listed ventless firebox enclosure. It has been design certified for
these installations. Exception: DO NOT install this appliance in a factory-built fireplace
that includes instructions stating that it has not been tested or should not be used with
unvented gas logs.
WARNING

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Height of Restriction (X) Minimum Depth of Fireplace/Firebox
No restriction 131/4"
0 to 1.5" 16"
Greater than 11/2" to 3" 16"
Greater than 3: ANY BARRIER GREATER THAN THREE INCHES (3")
PLACED IN FRONT OF THE GAS LOG SET IS NOT
RECOMMENDED BY THE MANUFACTURER.
PLACEMENT IN A FIREPLACE WITH A RESTRICTIVE BARRIER
IMPORTANT INFORMATION FOR THE INSTALLATION OF THIS GAS LOG SET
The following are guidelines for placing a gas log set in a replace that has a restrictive barrier along the bottom front open-
ing of the replace. Some examples of barriers are glass/screen door frames and sunken/recessed replaces.
Glass door frames
with adjustable
louvers should have
the lovers fully open
while the unit is in
operation.
Height of restrictive barrier
caused by glass door frames,
recessed fireplaces, etc. from
the base or bottom surface of the
unit. (See Table).
The log set should be
placed against or as near
as possible to the rear wall
of the fireplace/firebox.
Depth of fireplace/firebox.
(SeeTable).
Figure 3 - Reference Drawing of a Natural Flame Log Set in an Enclosure
NOTE: Non combustible material such as refractory brick may be used to line the floor of the fireplace in
order to raise the height of the gas log set in relation to a restrictive barrier. If the unit is raised,
the minimum height dimension listed in the homeowner’s manual must not be exceeded.
NOTE: If the log set is equipped with a remote receiver, a restrictive barrier may reduce the battery life
by increasing the ambient temperature inside the fireplace. Placement of the receiver outside of
the fireplace will extend the battery life.
X
Barriers such as the bottom of a glass door
frame placed in front of a gas log set can
change the air flow characteristics of the
fireplace which in turn can cause the unit to
overheat and malfunction.
WARNING

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

CLEARANCES AND HEIGHT REQUIREMENTS
Sidewall and ceiling clearances: The sides of the replace opening must be at least 16" from any combustible wall.
The ceiling must be at least 42" from the top of the replace opening.
Figure 4 - Sidewall & Ceiling Clearances
The dimensions shown in Figures 4 through 12 and defined in the fireplace manufacturer's
instructions are minimum clearances to maintain when installing this heater. Left and
right clearances are determined when facing the front of the heater.
When heater is installed into a ventless firebox, minimum clearances, as specified by
the ventless firebox manufacturer, must be met.
Follow these instructions carefully to ensure safe installation. Failure to follow
instructions exactly can create a fire hazard.
WARNING

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CLEARANCES and HEIGHT REQUIREMENTS
Heat resistant material (minimum requirements) with no wooden mantel or other combustible pro-
jection:
To install the gas logs into a replace with no wooden mantel, shelf or other combustible projection above the replace
opening, measure the heat resistant material height, per Figure 5, then See Table A.
Heat resistant materials such as slate and marble must be at least 1/2" thick. Sheet metal should not be installed onto
combustible material.
IMPORTANT: If you cannot meet these minimum clearances you must operate the heater with chimney ue damper open.
See Installing Vented Applications found on page 17.
Figure 5 - Measuring Heat Resistant Material
HEAT RESISTANT REQUIREMENTS FOR SAFE INSTALLATION
MATERIAL
MEASUREMENT DLX18 DLX24 AND DLX28
All Models All Models
12" or more Hood not required. Hood not required.
8" to less than 12" Hood not required. Extend heat resistent material to 12"
or install hood. See Figure 5.
Less than 8" Extend heat resistant Extend heat resistant material to at
material to at least 8" least 8" and install hood. See Figure
5 OR, extend heat resistant material
to a height of at least 12".
TABLE A - Heat Resistant Material Requirements with no Mantel or Combustible Projection

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HEAT RESISTANT REQUIREMENTS FOR SAFE INSTALLATION WITH WOODEN MANTEL,
MATERIAL SHELF OR OTHER COMBUSTIBLE PROJECTION
MEASUREMENT
DLX18 DLX24 AND DLX28
12" or more Hood not required. Observe profiles (side Hood not required. Observe profile (side
elevations) shown in Figure 7, page14. elevations) shown in Figure 9, page 15.
8" to less than 12" Install hood and observe profiles shown Install hood and observe profiles shown
in Figure 8, page 14; OR extend heat in Figure 8, page 14; OR extend heat
resistant material to at least 12" and observe resistant material to at least 12" and observe
profiles shown in Figure 7, page 14. profiles shown in Figure 9, page 15.
Less than 8" Extend heat resistant material to at least Extend heat resistant material to at least
8", install hood and observe profiles shown 8", install hood and observe profiles shown
in Figure 8, page 14; OR extend heat in Figure 8, page 14; OR extend heat
resistant material to at least 12" and observe resistant material to at least 12" and observe
profiles shown in Figure 7, page 14. profiles shown in Figure 9, page 15.
CLEARANCES AND HEIGHT REQUIRMENTS
Heat resistant material (minimum requirements) with wooden mantel or other combustible projection:
To install the heater with a wooden mantel, shelf or other combustible projection above, rst measure the heat resistant mate-
rial shown in Figure 6 then see Table B.
Figure 6 - Measuring Heat Resistant Material for Mantel
TABLE B - Heat Resistant Material Heights and Mantel Location

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





    






    
Example: A mantel may project from the wall a maximum of 21/2" at
a minimum of 8" above the opening, and a maximum of 6" at a
minimum of 141/2" above the opening.
CLEARANCES AND HEIGHT REQUIRMENTS
Figure 7 - Minimum Mantel Clearance with No Hood — DLX18
Figure 8 - Minimum Mantel Clearance with Hood — All Models
Example: The bottom of the mantel may project from the wall a maximum
of 21/2" at a minimum of 14" above the opening. The top shelf of
the mantel may project a maximum of 6" at a minimum of 201/2"
above the opening.

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  
 






Figure 10 is an example of an unsafe mantel instal-
lation. This mantel projects 4" at 8" above the opening,
exceeding the maximum acceptable distance of 21/2"
The mantel also projects 7" at 141/2" above the opening,
exceeding the maximum acceptable distance of 6".
If your mantel prole is unsafe, you may either:
• Raise the mantel to an acceptable height
OR
• Remove the mantel
CLEARANCES AND HEIGHT REQUIREMENTS
Figure 9 - Minimum Mantel Clearance with No Hood — DLX24 and DLX28
Figure 10 - Example of Unsafe Installation
Example: The bottom of the mantel may project from the wall a maxi-
mum of 10" at a minimum of 28" above the opening.

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 
FLOOR CLEARANCE
The gas log heater must be installed at least 5" above any combustible ooring material, such as carpeting or tile, which is
closer than 14" to the base of the replace. See Figure 11.
OR,
The gas log heater may be installed nearer to the oor if a minimum of 14" of noncombustible material such as slate or marble
is installed between the base of the replace and the combustible ooring. See Figure 12.
Figure 11 - Minimum Clearance above Combustible Flooring
Figure 12 - Minimum Clearance above Combustible Flooring with
Noncombustible Material Installed at Base of Fireplace

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 

Figure 13 - Damper Stop Installation.
(See WARNING at top of next page.)
FIREPLACE PREPARATION
BEFORE FULLY INSTALLING THE UNIT:
• Turn OFF the gas supply to the replace or rebox.
• Seal any fresh air vents and/or ash clean-out doors located on the oor or wall of the replace. If left unsealed, draft-
ing may cause pilot outage or sooting. Use a heat resistant sealant. Do not seal the chimney ue damper.
INSTALLING VENTED APPLICATIONS
Manual and millivolt controlled gas logs may be installed as a vented decorative log set in compliance with ANSI Z21.60
and National Fuel Gas Code, Section 6.6 Since, the gas logs are operated with the damper open, non-combustible material
and minimum mantel requirements do not apply.
BEFORE INSTALLING THE APPLIANCE:
• Turn off gas supply to replace or rebox.
• Have the replace oor and chimney professionally cleaned to remove ashes, soot, creosote or other obstructions. Have
this cleaning performed annually after installation.
• Seal any fresh air vents or ash clean-out doors located on oor or wall of replace. If not, drafting may cause pilot outage
or sooting. Use a heat-resistant sealant. Do not seal chimney ue damper.
Install and operate the appliance as directed in this manual.
DAMPER STOP INSTALLATION:
A damper stop must be provided with the unit. Contact your
dealer to obtain one. The damper stop must be installed as
shown in Figure 13 to prevent full closure of the replace
damper blade and provide a minimum 29 square inch ue
opening.
Before installing in a solid fuel burning
fireplace, The chimney flue and firebox
must be cleaned of soot, creosote,
ashes and loose paint by a qualified
chimney cleaner.
WARNING
This appliance is for installation only in a solid fuel burning fireplace (masonry fireplace
or manufactured fireplace) with a working flue and constructed of noncombustible
material. Exception: DO NOT install this applicance in a factory-built fireplace that
includes instructions stating it has not been tested or should not be used with unvented
gas logs.
WARNING

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 
INSTALLING VENTED APPLICATIONS
PLACING AND SECURING APPLIANCE
ASSEMBLY PROCEDURE:
1. Center the gas log unit in the replace or rebox. Make certain the front feet of the grate sit inside the front edge of
the replace or rebox.
2. See Figure 14 for hole locations. After centering the grate correctly, mark the hole positions on the replace/rebox
oor. Drill two (2) 5/32" diameter holes approximately 11/2" deep.
3. Anchor the grate to the replace/rebox oor using the screws provided. See Figure 14.
Proper installation of the grate is essential to prevent any movement of the gas logs and controls during operation.
Figure 14 - Securing Heater to Floor of Fireplace/Firebox
The fireplace and gas logs function as a system. If the fireplace is spilling into the room
(check with a match or a smoke stick), reposition the damper clamp until a positive
draft is obtained by opening the damper. If negative pressure in home prevents having
a positive draft, contact your dealer for assistance.
WARNING
You must secure the gas log heater to the fireplace floor. If not, the entire unit may move
when you adjust the controls. Movement of unit may cause shifting of the gas logs which
leads to sooting and improper burning. Grate movement could cause a gas leak.
Special care is required if you are installing the unit into a sunken fireplace. You must
raise the fireplace floor to allow access to gas log controls. This will insure adequate air
flow and guard against sooting. Raise the fireplace floor using noncombustible materials,
as described in “Placement in a fireplace with a restrictive barrier” on page 10.
WARNING

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Pipe Coupling
To Heater
Valve
CONNECTING THE GAS
NOTICE: A qualified gas appliance installer must connect the heater to the gas supply. Consult all
local codes.
IMPORTANT: Hold heater valve rmly with a wrench to prevent movement when connecting to inlet pipe.
Manual Shutoff
Valve
Pipe
Stainless
Flexible Tube
Figure 15 - Gas Connection
Always use an external regulator for all propane/LPG heaters and high pressure one to two pound natural gas systems to
reduce the supply tank pressure to a maximum of 13" w.c. This is in addition to the internal regulator in the heater valve.
Gas Supply Inlet
Locations that the
Pressure Tapping
Point May Be
Installed
Use new black iron or steel pipe. Internally tinned copper or copper tubing can be used
per National Fuel Code, section 2.6.3, providing gas meets hydrogen sulfide limits, and
where permitted by local codes. Gas piping system must be sized to provide minimum
inlet pressure (Listed on Data Plate) at the maximum flow rate (BTU/Hr). Undue pressure
loss will occur if the pipe is too small.
A manual shutoff valve must be installed upstream of the appliance. Union tee and
plugged 1/8" NPT pressure tapping point should be installed upstream of the appliance.
See Figure 15.
CAUTION
Check gas type: The gas supply must be the same as stated on the heater’s rating plate.
If the gas supply is different, DO NOT INSTALL THE HEATER. Contact your dealer for
the correct model.
CAUTION

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CHECKING GAS PRESSURE
NPT Test Plug
Test Port “OUT”
Test
Points
Test all gas joints from the gas meter to the heater valve for leaks using a gas analyzer or soap and water solution after com-
pleting connection. DO NOT USE AN OPEN FLAME.
Check the gas pressure with the appliance burning and the control set to HIGH.
MANUAL CONTROL (Figure 16)
The pressure regulator is preset and locked to dis-
courage tampering. If the pressure is not as specied,
replace the regulator with the correct part from the parts
list in this manual.
Remove 1/8" NPT plug, located on either side of regu-
lator body. Install tting and tubing to pressure gauge.
After taking pressure reading, reinstall test plug. Check
for gas leaks.
THERMOSTAT CONTROL (Figure 17)
Turn captured screw counter clockwise two or three
turns and then place tubing to pressure gauge over test
point (Use test point closest to control knob). After tak-
ing pressure reading, be sure and turn captured screw
clockwise rmly to reseal. Do not over torque. Check
for gas leaks.
MILLIVOLT CONTROL (Figure 18)
The valve regulator controls the burner pressure which
should be checked at the pressure test point.
Turn captured screw counter clockwise two or three
turns and then place tubing to pressure gauge over test
point. (Use test point “OUT” closest to gas inlet). After
taking pressure reading, be sure and turn captured screw
clockwise rmly to reseal. Do not over torque. Check
for gas leaks.
Figure 16 - Pressure Test Point Location
Figure 17 - Alternate Test Point Location for Thermostat
Control Unit
Figure 18 - Pressure Test Point Location
The heater gas inlet connection is a 3/8" NPT at the valve. To connect from
the opposite side, route the pipe under the rear portion of the unit.
When tightening up the joint to the valve, hold the valve securely to prevent
movement.
Connecting directly to
an unregulated propane/
LPG tank can cause an
explosion.
WARNING